. West fork of Swift Creek timber sale project final environmental impact statement . Forest reserves; Logging; Logging; Environmental impact statements; Harvesting. This native bridge has collapsed into the creek, contributing sediment to the This dirt-covered old wooden bridge has been overgrown with vegetation and would eventually collapse and contribute sediment to the stream. condition as a result of past activity. These levels are much less than the 10 percent threshold of concern recommended for water- yield increases in the watershed. ALTERNATIVE EFFECTS DIRECT AND INDIRECT EF
. West fork of Swift Creek timber sale project final environmental impact statement . Forest reserves; Logging; Logging; Environmental impact statements; Harvesting. This native bridge has collapsed into the creek, contributing sediment to the This dirt-covered old wooden bridge has been overgrown with vegetation and would eventually collapse and contribute sediment to the stream. condition as a result of past activity. These levels are much less than the 10 percent threshold of concern recommended for water- yield increases in the watershed. ALTERNATIVE EFFECTS DIRECT AND INDIRECT EFFECTS C Direct and Indirect Effects qfJVo-,Icfion No direct effects to sediment delivery or water yield would occur beyond those under current management. C Direct and Indirect Effects Common to miction v'llternatiees B and C The wooden bridge spanning the West Fork on Stryker Basin Road would be replaced under either proposed action alternative. Also, 3 log crossings with earthen fill would be removed and the streambanks rehabilitated in the upper reaches of Stryker Basin. The proposed work on these sites would contribute sediment to the West Fork only while crews are operating. Sediment contribution would be minimized through BMPs and erosion-control measures. These projects would reduce the annual sediment delivery by approximately tons of sediment per year and remove about 750 tons of bridge fill that would eventually fall into the creek if the sites are not repaired. C Direct and Indirect Effects of miction ,/Ilternatire B Erosion control and BMPs would be improved in the West Fork and Johnson Creek watersheds along approximately 31 miles of existing road. This work would lower the annual sediment load to the West Fork by approximately tons, and to Johnson Creek by approximately tons. Ground-based yarding would increase the risk of sediment delivery by exposing soil in skid Chapter III Existing Environment and Environmental Consequences Page 111
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